Base64Lens
Open converter

Strict text decoding

Decode Base64 to exact UTF-8 text

Invalid alphabets, padding, trailing bits and UTF-8 fail visibly instead of being repaired or replaced.

Runs locally

Convert one UTF-8 text value

Text stays in this browser

Up to 500,000 UTF-16 units for plain text or 1,000,000 Base64 characters.

Text only: no files, JWT parsing, MIME, data URI prefixes, whitespace repair or alphabet auto-detection.

Base64 is not encryption. Do not paste live credentials or secrets merely because processing is local.

Exact result

Exact decoded UTF-8 text

UTF-8 bytes7
Base64 symbols10
Padding characters2
Input UTF-16 length12
Output UTF-16 length7
Explicit profileStandard Base64 (+ /) · Padded (= required when needed)
Converted text
First 32 bytes in hexadecimal
48 65 6C 6C 6F 3E 3F

No trimming, whitespace removal, normalization, charset guessing, padding repair or alphabet auto-detection is applied.